Thread Subject: loading files using eval ' problem

Hi there!

I have the following problem:

I can upload some files which have the following format:

initp1 = load('initial_parameters1.txt');
initp2 = load('initial_parameters2.txt');
initp3 = load('initial_parameters3.txt');
initp4 = load('initial_parameters4.txt');

I am trying to use eval

for i = 1:4

eval(['initp',
num2str(i),'=load(initial_parameters',num2str(i),'.txt);'])

end

But since I need to insert the ' character after the load and after
the txt' I can not use it.

I am in the directory where the files are stored /global/proddatadg/
sdpe/production/MBS/devel/fmsu_pdfs/pdf_results/init_parameters
(In fact I can do initp4 = load('initial_parameters4.txt'); with no
problems)

and I have tried to use
addpath('/global/proddatadg/sdpe/production/MBS/devel/fmsu_pdfs/
pdf_results/init_parameters");

Does anyone know how to solve the ' problem?

Thank you very much in advance.

Kind regards,

Pep

On Jun 17, 11:11 am, Pep <peppuigv...@gmail.com> wrote:
> Hi there!
>
> I have the following problem:
>
> I can upload some files which have the following format:
>
> initp1 = load('initial_parameters1.txt');
> initp2 = load('initial_parameters2.txt');
> initp3 = load('initial_parameters3.txt');
> initp4 = load('initial_parameters4.txt');
>
> I am trying to use eval
>
> for i = 1:4
>
> eval(['initp',
> num2str(i),'=load(initial_parameters',num2str(i),'.txt);'])
>
> end
>
> But since I need to insert the ' character after the load and after
> the txt' I can not use it.
>
> I am in the directory where the files are stored /global/proddatadg/
> sdpe/production/MBS/devel/fmsu_pdfs/pdf_results/init_parameters
> (In fact I can do initp4 = load('initial_parameters4.txt'); with no
> problems)
>
> and I have tried to use
> addpath('/global/proddatadg/sdpe/production/MBS/devel/fmsu_pdfs/
> pdf_results/init_parameters");
>
> Does anyone know how to solve the ' problem?
>
> Thank you very much in advance.
>
> Kind regards,
>
> Pep

Hi
You don't need commas.
eval(['initp'num2str(i)'=load(initial_parameters' num2str(i)
'.txt);'])
I think this will work.
Best.
Petro.

Pep <peppuigvert@gmail.com> wrote in message
<9d68855a-99ab-4c64-bd0c-2d9740381f7f@x41g2000hsb.googlegroups.com>...
> Hi there!
>
> I have the following problem:
>
> I can upload some files which have the following format:
>
> initp1 = load('initial_parameters1.txt');
> initp2 = load('initial_parameters2.txt');
> initp3 = load('initial_parameters3.txt');
> initp4 = load('initial_parameters4.txt');
>
> I am trying to use eval
>
> for i = 1:4
>
> eval(['initp',
> num2str(i),'=load(initial_parameters',num2str(i),'.txt);'])
>
> end
>
> But since I need to insert the ' character after the load
and after
> the txt' I can not use it.
>
> I am in the directory where the files are stored
/global/proddatadg/
>
sdpe/production/MBS/devel/fmsu_pdfs/pdf_results/init_parameters
> (In fact I can do initp4 =
load('initial_parameters4.txt'); with no
> problems)
>
> and I have tried to use
>
addpath('/global/proddatadg/sdpe/production/MBS/devel/fmsu_pdfs/
> pdf_results/init_parameters");
>
> Does anyone know how to solve the ' problem?
>
> Thank you very much in advance.
>
> Kind regards,
>
> Pep
Why use eval ? It is a bad way.
Use cell array instead :
for i=1:4
   initp{i} = load(sprintf('initial_parameters%d.txt',i));
end

BTW to put a ' in a string you just have to double it e.g. :
str='string with '' inside and at the end'''

Caroline

On 17 Juny, 11:19, Piter_ <x.pi...@gmail.com> wrote:
> On Jun 17, 11:11 am, Pep <peppuigv...@gmail.com> wrote:
>
>
>
>
>
> > Hi there!
>
> > I have the following problem:
>
> > I can upload some files which have the following format:
>
> > initp1 = load('initial_parameters1.txt');
> > initp2 = load('initial_parameters2.txt');
> > initp3 = load('initial_parameters3.txt');
> > initp4 = load('initial_parameters4.txt');
>
> > I am trying to use eval
>
> > for i = 1:4
>
> > eval(['initp',
> > num2str(i),'=load(initial_parameters',num2str(i),'.txt);'])
>
> > end
>
> > But since I need to insert the ' character after the load and after
> > the txt' I can not use it.
>
> > I am in the directory where the files are stored /global/proddatadg/
> > sdpe/production/MBS/devel/fmsu_pdfs/pdf_results/init_parameters
> > (In fact I can do initp4 = load('initial_parameters4.txt'); with no
> > problems)
>
> > and I have tried to use
> > addpath('/global/proddatadg/sdpe/production/MBS/devel/fmsu_pdfs/
> > pdf_results/init_parameters");
>
> > Does anyone know how to solve the ' problem?
>
> > Thank you very much in advance.
>
> > Kind regards,
>
> > Pep
>
> Hi
> You don't need commas.
> eval(['initp'num2str(i)'=load(initial_parameters' num2str(i)
> '.txt);'])
> I think this will work.
> Best.
> Petro.- Amaga el text entre cometes -
>
> - Mostra el text citat -

>> eval(['initp'num2str(i)'=load(initial_parameters' num2str(i) '.txt);'])
??? eval(['initp'num2str(i)'=load(initial_parameters' num2str(i)
'.txt);'])
                 |
Error: Unexpected MATLAB expression.
Thanks Petro unfortunately this is not still working. Any other hint
it will much appreciated.
Pep

Pep <peppuigvert@gmail.com> wrote in message
<snip>
>
> >> eval(['initp'num2str(i)'=load(initial_parameters'
num2str(i) '.txt);'])
> ??? eval(['initp'num2str(i)'=load(initial_parameters'
num2str(i)
> '.txt);'])
> |
> Error: Unexpected MATLAB expression.
> Thanks Petro unfortunately this is not still working. Any
other hint
> it will much appreciated.
> Pep

Have you seen my message (number 3) ?
I have posted at the mostly same time than Piter_ so maybe
you didn't see it.

Caroline

Pep <peppuigvert@gmail.com> wrote in message
<9d68855a-99ab-4c64-bd0c-2d9740381f7f@x41g2000hsb.googlegroups.com>...
> still using eval, after

Just to highlight Caroline's remark: Do not use eval!

As you have found out already it makes debugging very hard.
For your problem, use the function form of LOAD, as in

i = 3 ;
S = load(['name' num2str(i) '.mat']) ;

hth
Jos

On 17 Juny, 11:56, "Jos " <DEL...@jasenDEL.nl> wrote:
> Pep <peppuigv...@gmail.com> wrote in message
>
> <9d68855a-99ab-4c64-bd0c-2d9740381...@x41g2000hsb.googlegroups.com>...
>
> > still using eval, after
>
> Just to highlight Caroline's remark: Do not use eval!
>
> As you have found out already it makes debugging very hard.
> For your problem, use the function form of LOAD, as in
>
> i = 3 ;
> S = load(['name' num2str(i) '.mat']) ;
>
> hth
> Jos

Thanks a lot!
Your contributions really enhanced my program.
Kind regards,
Pep